chore: add validation (#367)

.github/workflow/validate.yml

@@ -0,0 +1,45 @@
+name: Validate
+on:
+  push:
+  branches: [v24]
+  workflow_dispatch:
+  pull_request:
+jobs:
+  validate:
+    runs-on: windows-latest
+    steps:
+      - run: |
+          # INSTALL LICENSE
+          mkdir -p ~/.vaadin/
+          echo '{"username":"'`echo ${{secrets.TB_LICENSE}} | cut -d / -f1`'","proKey":"'`echo ${{secrets.TB_LICENSE}} | cut -d / -f2`'"}' > ~/.vaadin/proKey
+          echo "${{secrets.SS_LICENSE}}" > ~/vaadin.spreadsheet.developer.license
+        shell: bash
+      - uses: browser-actions/setup-chrome@latest
+        with:
+          chrome-version: stable
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - uses: stCarolas/setup-maven@v5
+        with:
+          maven-version: '3.9.0'
+      - run: |
+          mvn -ntp -B clean install -Pproduction,it \
+            -Dcom.vaadin.testbench.Parameters.testsInParallel=2 \
+            -Dmaven.test.redirectTestOutputToFile=true \
+            -Dcom.vaadin.testbench.Parameters.headless=true -Dheadless \
+            -Dmaven.compiler.showDeprecation
+        env:
+            MAVEN_ARGS: ${{env.MAVEN_ARGS}}
+        shell: bash
+      - if: ${{failure()}}
+        uses: actions/[email protected]
+        with:
+          name: failed-outputs
+          path: target
+          if-no-files-found: warn
+          retention-days: 7